﻿// Copyright 2004-2011 Castle Project - http://www.castleproject.org/
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//     http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#region 导入名称空间

using System.Reflection.Emit;

#endregion

namespace LightWork.DynamicProxy.Generators.Emitters.SimpleAST
{
    public class LiteralIntExpression : Expression
    {
        private readonly int value;

        public LiteralIntExpression(int value)
        {
            this.value = value;
        }

        public override void Emit(IMemberEmitter member, ILGenerator gen)
        {
            switch (value)
            {
                case -1:
                    gen.Emit(OpCodes.Ldc_I4_M1);
                    break;
                case 0:
                    gen.Emit(OpCodes.Ldc_I4_0);
                    break;
                case 1:
                    gen.Emit(OpCodes.Ldc_I4_1);
                    break;
                case 2:
                    gen.Emit(OpCodes.Ldc_I4_2);
                    break;
                case 3:
                    gen.Emit(OpCodes.Ldc_I4_3);
                    break;
                case 4:
                    gen.Emit(OpCodes.Ldc_I4_4);
                    break;
                case 5:
                    gen.Emit(OpCodes.Ldc_I4_5);
                    break;
                case 6:
                    gen.Emit(OpCodes.Ldc_I4_6);
                    break;
                case 7:
                    gen.Emit(OpCodes.Ldc_I4_7);
                    break;
                case 8:
                    gen.Emit(OpCodes.Ldc_I4_8);
                    break;
                default:
                    gen.Emit(OpCodes.Ldc_I4, value);
                    break;
            }
        }
    }
}